This text is quoted from promotion material. Text and images are copyrighted by the original publisher.
In this scenario, the player characters pass through a magical mirror to save victims who are trapped in a "pocket universe" within the mirror; the hard part is getting back out again. The module includes pregenerated player characters and players' aids.
The wizard Skarda and his band of raiders once terrorized the rural settlements of the Grand Duchy of Karameikos, kidnapping everyone and taking their treasure. By chance, he was discovered by famous adventurer Lord Retameron in Specularum. In the aftermath of the raid, Skarda (alias Mallek) was left trapped in his burning house. A search of the wreckage found papers describing his role in the raids and outlining a coup against the Duke, and a magical mirror of great power. Retameron kept the mirror and brought it to his tower. One night, both he and his wife Halia gazed into the mirror and disappeared, and in their place appeared large baboon-like creatures with huge teeth that attacked everyone in sight. So far, no one has come out of the tower alive. Retameron's father finds the player characters and pleads with them to enter the tower and rescue his son.
X12 Skarda's Mirror was written by Aaron Allston, with a cover by Tim Hildebrandt and interior illustrations by Al Williamson, and was published by TSR in 1987 as a 48-page booklet with an outer folder.